/*
 * FILE:	sha2.h
 * AUTHOR:	Aaron D. Gifford <me@aarongifford.com>
 * 
 * Copyright (c) 2000-2001, Aaron D. Gifford
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $Id: sha2.h,v 1.1 2001/11/08 00:02:01 adg Exp adg $
 */

#ifndef __SHA2_H__
#define __SHA2_H__

/*
 * Import u_intXX_t size_t type definitions from system headers.  You
 * may need to change this, or define these things yourself in this
 * file.
 */
#include <sys/types.h>

/*** SHA-256/384/512 Various Length Definitions ***********************/

#define SHA1_BLOCK_LENGTH		64
#define SHA1_DIGEST_LENGTH		20
#define SHA256_BLOCK_LENGTH		64
#define SHA256_DIGEST_LENGTH	32
#define SHA384_BLOCK_LENGTH		128
#define SHA384_DIGEST_LENGTH	48
#define SHA512_BLOCK_LENGTH		128
#define SHA512_DIGEST_LENGTH	64

/*** SHA-256/384/512 Context Structures *******************************/
/* NOTE: If your architecture does not define either u_intXX_t types or
 * uintXX_t (from inttypes.h), you may need to define things by hand
 * for your system:
 */

#ifndef u_int8_t
#define u_int8_t unsigned char		/* 1-byte  (8-bits)  */
#endif

#ifndef u_int32_t
#define u_int32_t unsigned int		/* 4-bytes (32-bits) */
#endif
//changed long int to long long since in VS long is 4 bytes while long long is 8 on both VS and gcc  - Cherian.

#ifndef u_int64_t
#define  u_int64_t unsigned long long 	/* 8-bytes (64-bits) */
#endif


typedef union
{
	u_int8_t  c[64];
	u_int32_t l[16];
} SHA1_WORKSPACE_BLOCK;
	
	// Member variables
	
typedef struct _SHA1_CTX {
	u_int32_t m_state[5];
	u_int32_t m_count[2];
	u_int32_t __reserved1[1];
	u_int8_t  m_buffer[64];
	u_int8_t  m_digest[20];
	u_int32_t __reserved2[3];
	u_int32_t	state[8];
	u_int8_t m_workspace[64];
	SHA1_WORKSPACE_BLOCK *m_block; // SHA1 pointer to the byte array above
} SHA1_CTX;
typedef struct _SHA256_CTX {
	u_int32_t	state[8];
	u_int64_t	bitcount;
	u_int8_t	buffer[SHA256_BLOCK_LENGTH];
} SHA256_CTX;
typedef struct _SHA512_CTX {
	u_int64_t	state[8];
	u_int64_t	bitcount[2];
	u_int8_t	buffer[SHA512_BLOCK_LENGTH];
} SHA512_CTX;

typedef SHA512_CTX SHA384_CTX;


/*** SHA-1/256/384/512 Function Prototypes ******************************/
void SHA1_Data(const u_int8_t*, size_t, u_int8_t[SHA1_DIGEST_LENGTH]);
void SHA256_Data(const u_int8_t*, size_t, u_int8_t[SHA256_DIGEST_LENGTH]);
void SHA384_Data(const u_int8_t*, size_t, u_int8_t[SHA384_DIGEST_LENGTH]);
void SHA512_Data(const u_int8_t*, size_t, u_int8_t[SHA512_DIGEST_LENGTH]);

// added for SHA1

// You can define the endian mode in your files, without modifying the SHA1
// source files. Just #define SHA1_LITTLE_ENDIAN or #define SHA1_BIG_ENDIAN
// in your files, before including the SHA1.h header file. If you don't
// define anything, the class defaults to little endian.

#if !defined(SHA1_LITTLE_ENDIAN) && !defined(SHA1_BIG_ENDIAN)
#define SHA1_LITTLE_ENDIAN
#endif

/////////////////////////////////////////////////////////////////////////////
// Declare SHA1 workspace


#endif /* __SHA2_H__ */

